Abstract
ABSTRACT A common form of neomorphism in ancient carbonate rocks is the recrystallization of micrite to microspar. This occurs when a cage of magnesium ions is flushed from 2 µm micrite grains and permits them to recrystallize to microspar grains 5 to 10 µm in diameter. Some clays play an important role in this type of neomorphism. In the Bromide Formation (Middle Ordovician, Oklahoma) shale beds of chlorite and/or montmorillonite attracted magnesium ions from adjacent micrite beds and greatly facilitated the formation of microspar. In the absence of clays, porosity controlled the formation of microspar. Some neomorphism of micrite to microspar occurred during outcrop weathering, but most neomorphism seems to have occurred after burial to moderate depths and after cementation of ssociated limestones.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
